After testing the upgraded network technology in Philadelphia for the last year, T-Mobile today announced that the enhancement has gone live in the "Northeastern U.S," which includes the New York City metropolitan area, New Jersey and Long Island, upstate New York (Albany, Buffalo, Rochester and Syracuse,) Connecticut (Hartford, New Haven, Milford and Stamford,) and Providence, R.I. Additionally, the HSPA+ network has gone live in Memphis, Tennessee and Las Vegas Nevada.

T-Mobile says its HSPA+ network will expand into Boston and Washington, D.C. in the coming weeks.

Only two days ago, one of T-Mobile's premier Android devices, the HTC Nexus One, was the first consumer smartphone to receive the Android 2.2 "FroYo" update. The update reportedly boosts the device's performance as much as 2 to 5 times.

Though only rolled out to a small group initially, the Android team at Google this afternoon said they "expect a final build [of Android 2.2] to be available for OTA updates shortly."

So with the fastest version of Android yet, and much faster network at its disposal in a large section of the United States, T-Mobile's Nexus One has significantly increased in value in just the last week.